We then walked through a park by Buckingham Palace to get to Westminster Abbey which was beautiful, and then we got to see Big Ben (which, fun fact, is now called Queen Elizabeth Tower because of the Diamond Jubilee). We ate lunch at a place called Wesley Cafe and then walked around a little more past Downing Street, the houses of Parliament and the Household Cavalry museum and then got back on the bus. We drove around London on the bus for a while and drove past Baker Street (where the famous 221b Baker Street is), Tower of London, Tower Bridge (with the Paralympic logo hanging off it) and other beautiful buildings.
I had a great time in London and can't wait to explore further soon. I have included some photo highlights in a slideshow below (clicking on the pictures allows you to view them larger):